Journal ArticleDOI
Submatrix approach to stiffness matrix correction using modal test data
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In this article, an efficient method for stiffness matrix correction to match modal testing data is presented, where significant reduction of unknown parameters is achieved by grouping the elements of the same stiffness characteristics and representing them as a multiplication of a scaling factor and a submatrix.Abstract:
An efficient method six stiffness matrix correction to match modal testing data is presented. Significant reduction of unknown parameters is achieved by grouping the elements of the same stiffness characteristics and representing them as a multiplication of a scaling factor and a submatrix. A concise formulation to identify the scaling factors is found by utilizing a least squares solution. The formulation also incorporates a capability of reducing finite element mass and stiffness matrices to test degrees-of-freedom for a direct analysis/experiment correlationread more
Citations
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A summary review of vibration-based damage identification methods
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Substructural identification using neural networks
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Improved Approximate Methods for Computing Eigenvector Derivatives in Structural Dynamics
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Structural Dynamic Model Updating Techniques: A State of the Art Review
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An overview of modal-based damage identification methods
TL;DR: In this article, the authors provide an overview of methods that examine changes in measured vibration response to detect, locate, and characterize damage in structural and mechanical systems, and discuss critical issues for future research in the area of modal-based damage identification.
References
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Journal ArticleDOI
Reduction of stiffness and mass matrices
TL;DR: In this article, the authors proposed a method for reducing the size of the stiffness matrix by eliminating coordinates at which no forces are applied, based on the procedure used in Ref. 1 for stiffness matrix reduction.
Book
Structural Dynamics: An Introduction to Computer Methods
Roy R. Craig,Steven E. Benzley +1 more
TL;DR: The Science and Art of Structural Dynamics as discussed by the authors is a popular topic in the field of structural engineering, especially in the area of dynamic response of multidimensional dynamical systems.
Journal ArticleDOI
Improvement of a Large Analytical Model Using Test Data
Alex Berman,E. J. Nagy +1 more
TL;DR: In this paper, a method has been developed which uses measured normal modes and natural frequencies to improve an analytical mass and stiffness matrix model of a structure, which directly identifies, without iteration, a set of minimum changes in the analytical matrices which force the eigensolutions to agree with the test measurements.
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Optimal Weighted Orttiogonalization of Measured Modes
Journal ArticleDOI
Stiffness matrix adjustment using mode data
TL;DR: In this paper, a procedure that uses structural connectivity information to optimally adjust deficient stiffness matrices is presented. But the adjustment performed are such that the percentage change to each stiffness coefficient is minimized.